| /* |
| au0828-vbi.c - VBI driver for au0828 |
| |
| Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com> |
| |
| This work was sponsored by GetWellNetwork Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA. |
| */ |
| |
| #include "au0828.h" |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| |
| /* ------------------------------------------------------------------ */ |
| |
| static int vbi_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, |
| unsigned int *nbuffers, unsigned int *nplanes, |
| unsigned int sizes[], void *alloc_ctxs[]) |
| { |
| struct au0828_dev *dev = vb2_get_drv_priv(vq); |
| unsigned long img_size = dev->vbi_width * dev->vbi_height * 2; |
| unsigned long size; |
| |
| size = fmt ? (fmt->fmt.vbi.samples_per_line * |
| (fmt->fmt.vbi.count[0] + fmt->fmt.vbi.count[1])) : img_size; |
| if (size < img_size) |
| return -EINVAL; |
| |
| *nplanes = 1; |
| sizes[0] = size; |
| |
| return 0; |
| } |
| |
| static int vbi_buffer_prepare(struct vb2_buffer *vb) |
| { |
| struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue); |
| struct au0828_buffer *buf = container_of(vb, struct au0828_buffer, vb); |
| unsigned long size; |
| |
| size = dev->vbi_width * dev->vbi_height * 2; |
| |
| if (vb2_plane_size(vb, 0) < size) { |
| pr_err("%s data will not fit into plane (%lu < %lu)\n", |
| __func__, vb2_plane_size(vb, 0), size); |
| return -EINVAL; |
| } |
| vb2_set_plane_payload(&buf->vb, 0, size); |
| |
| return 0; |
| } |
| |
| static void |
| vbi_buffer_queue(struct vb2_buffer *vb) |
| { |
| struct au0828_dev *dev = vb2_get_drv_priv(vb->vb2_queue); |
| struct au0828_buffer *buf = container_of(vb, struct au0828_buffer, vb); |
| struct au0828_dmaqueue *vbiq = &dev->vbiq; |
| unsigned long flags = 0; |
| |
| buf->mem = vb2_plane_vaddr(vb, 0); |
| buf->length = vb2_plane_size(vb, 0); |
| |
| spin_lock_irqsave(&dev->slock, flags); |
| list_add_tail(&buf->list, &vbiq->active); |
| spin_unlock_irqrestore(&dev->slock, flags); |
| } |
| |
| struct vb2_ops au0828_vbi_qops = { |
| .queue_setup = vbi_queue_setup, |
| .buf_prepare = vbi_buffer_prepare, |
| .buf_queue = vbi_buffer_queue, |
| .start_streaming = au0828_start_analog_streaming, |
| .stop_streaming = au0828_stop_vbi_streaming, |
| .wait_prepare = vb2_ops_wait_prepare, |
| .wait_finish = vb2_ops_wait_finish, |
| }; |